Veryfast preset always produced smaller file than faster and fast preset, in most cases also smaller than medium preset. Valid presets are ultrafast, superfast, veryfast, faster, fast, medium. I was able to reproduce this behavior on Ubuntu as well as Windows, with three different input files (H.264, MPEG2, MJPEG), also with CFR values 18, 23 and 28. Hi i saw many users have problem in conversion with libx264 when ffmpeg tries to. % ffmpeg -i newmobcal1920_12mbps.ts -c:v libx264 -profile:v high -level 4.0 -preset veryfast result-veryfast.mkv % ffmpeg -i newmobcal1920_12mbps.ts -c:v libx264 -profile:v high -level 4.0 -preset faster result-faster.mkv However, by my testing, faster preset produced always bigger file than veryfast preset.įfmpeg version N-81696-gd38dff8e-static Copyright (c) 2000-2016 the FFmpeg developersīuilt with gcc 5.4.1 (Debian 5.4.1-2) 20160904Ĭonfiguration: -enable-gpl -enable-version3 -enable-static -disable-debug -enable-libmp3lame -enable-libx264 -enable-libx265 -enable-libwebp -enable-libspeex -enable-libvorbis -enable-libvpx -enable-libfreetype -enable-fontconfig -enable-libxvid -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libtheora -enable-libvo-amrwbenc -enable-gray -enable-libopenjpeg -enable-libopus -enable-libass -enable-gnutls -enable-libvidstab -enable-libsoxr -enable-frei0r -enable-libfribidi -disable-indev=sndio -disable-outdev=sndio -enable-librtmp -enable-libmfx -enable-libzimg -cc=gcc-5 According to , for constant quality encoding, faster preset should be slower and produce smaller file than veryfast preset.
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